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Finding the Fourth Proportional to 739.82, 1,021.04 and 425.12

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Solution

The fourth proportional to 739.82, 1,021.04 and 425.12 is: 586.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.82 : 1,021.04 = 425.12 : x
  2. Step 2: Convert to fraction form
    739.82/1,021.04 = 425.12/x
  3. Step 3: Cross multiply
    739.82x = 1,021.04 × 425.12
  4. Step 4: Simplify right side
    739.82x = 434,064.52
  5. Step 5: Solve for x
    x = 434,064.52/739.82
  6. Step 6: Final answer
    x = 586.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.